Characterizing the Timing Performance of a Fast 4H-SiC Detector With an $^{241}$ Am Source

An SPX4 4H-silicon carbide detector consisting of 4 × 4 pixels was developed and studied experimentally. Its pixel size is 400 × 400 μm
²
. A timing resolution of 117 ± 11 ps full width at half-maximum (FWHM) has been measured for the detection of alphas. With such good timing performance and high granularity, the SiC pixel detector holds great promise as an associated alpha-particle detector for fast neutron imaging.